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  | | Die Entstehung der Erde - Klima, Vulkane, Flüsse, Pflanzen, Wüste by Coenraads, Dr. Robert R. + Koivula, John J. Published 2011 by Ullmann Publishing Gmbh ISBN-13: 978-3-8427-0237-0, ISBN: 3-8427-0237-X |
 | | Geologica by Andrew Davies , Robert Coenraads , John Koivula Hardcover, 576 Pages, Published 2013 by Ullmann Publishing Gmbh ISBN-13: 978-3-8480-0487-4, ISBN: 3-8480-0487-9 |